ricanxplaya

yesterday i did a compression test on jdm b16a in cold test before start up.

those are the following results i got: cyl 1- 180psi
2-175psi
3- 0 psi
4- 0 psi

when i see this result, i knew this is not good compression at all. could be blown or etc etc..

so i called the shop in orlando where i bought from. they tell me that it was because of cold. and they tell me that i should let run it up and warm it up. that my compression will build up. to be honest i doubt it. i still should get compression even in cold? is there any difference? should i start it up? please give feedback or anything. appriecate it

grumblemarc

iTrader: (4)

YOu sure you're doing them correctly? Did you do a wet and dry?

• How To Perform a Cylinder Compression Test
  
• How To Perform a Cylinder Leak Down Test

ricanxplaya

yes, correct me if im wrong..

disable fuel pump and do compression test.. simple as that.

kyden

you also have to have the throttle wide open, but even then it still shouldn't be 0. though compression tests should be done on an engine at operating temp.

ricanxplaya

sorry didnt see the part wet and dry.. umm i only did compression test. i believe it is dry. since i just bought it 2 weeks ago, there are still old oil left in there from previous owner.

ricanxplaya

ok well that one thing i didnt do wot.. maybe thats why i get 0psi? im going to redo now.

ricanxplaya

just done redo test compression. with disabled fuel pump, wot and the result are still the same as above..

grumblemarc

iTrader: (4)

Then your engine is through.

ricanxplaya

should i try start it up and see? with operating temp

grumblemarc

iTrader: (4)

Could you give some more detail? Backstory? How did we get to this point?

ricanxplaya

well. i bought this engine from jdm shop in orlando two weeks ago, they tell me that the motor is in about 45k miles. so i replaced timing belt, water pump, spark plugs, spark wires, clutch kits and check underneath valve cover, i see light cooper/gold on internal parts from oil. everything seem good, i dropped in the engine bay, before i start up, i did compression test. and there goes the result.

Former User

Return the engine to them.

ricanxplaya

i told them i need to replace other with known good compression on one of their engines. they go like, no no you need to start it up and let it run for a few day and the compression will build up. wtf it doesnt build up in a few days. it will have compression right there, right now as it should be.

grumblemarc

iTrader: (4)

You have a warranty from them?

Former User

I think the engine is toast. However, is the mechanical timing dead on? What do the numbers look like if you add a tablespoon of oil to each cylinder prior to the compression test?

ricanxplaya

yes i still have warranty until feb 25.

i added a teaspoon of oil to each cyl. number 4 improved but still underrated at 50psi, number 3 still has 0 psi. the rest still the same psi as before.


mechincal timing on? u mean tdc? yes the timings right..

grumblemarc

iTrader: (4)

Force them to honor the warranty.

Former User

Pull the motor and return it, if the mechanical timing is dead on:

ricanxplaya

yes, im going to call them back, but the problem is im deaf and they might think they can take advantage of me. i will let u know how it goes.. they better replace it.. should i replace the whole swap or just the engine self? i have no idea if the trans is good.

Former User

Bring a buddy with you.

grumblemarc

iTrader: (4)

Return what you bought from them for a full refund (or whatever the warranty covers) then go somewhere else.

grumblemarc

iTrader: (4)

The bigger the better.

ricanxplaya

well i called back and they insist me to have it running first. they kept saying that the motor was sitting for too long time and probably loses it compression. so im gonna ahead run it up. if its still low compression after operating temp. then they want me to call back...

grumblemarc

iTrader: (4)

3 words. Small. Claims. Court. I wouldn't do anything else they tell you.

ricanxplaya

if they refuse to replace with their other known good compression i will take them to court for sure